“It’s a huge day in the Marvel Universe,” the show’s moderator, Whoopi Goldberg, said. “Thor, the God of Thunder, he messed up, and he’s no longer worthy to hold that damn hammer of his. For the first time in history, that hammer is being held by a woman. That’s right. Thor is a woman!”

The series will be written by Jason Aaron, with art by Russell Dauterman.

Info directly from Marvel is below:

This October, Marvel Comics evolves once again in one of the most shocking and exciting changes ever to shake one of Marvel’s “big three” – Captain American, Iron Man and Thor – Marvel Comics will be introducing an all-new THOR, GOD OF THUNDER. No longer is the classic male hero able to hold the mighty hammer, Mjölnir, a brand new female hero will emerge who will be worthy of the name THOR. Who is she? Where did she come from and what is her connection to Asgard and the Marvel Universe?

“The inscription on Thor’s hammer reads ‘Whosoever holds this hammer, if HE be worthy, shall possess the power of Thor.’ Well it’s time to update that inscription,” says Marvel editor Wil Moss. “The new Thor continues Marvel’s proud tradition of strong female characters like Captain Marvel, Storm, Black Widow and more. And this new Thor isn’t a temporary female substitute – she’s now the one and only Thor, and she is worthy!”

Series writer Jason Aaron emphasizes, “This is not She-Thor. This is not Lady Thor. This is not Thorita. This is THOR. This is theTHOR of the Marvel Universe. But it’s unlike any Thor we’ve ever seen before.”